CR250 ignition for the 500 question (pic)

Caseys500 · Post by **Caseys500** » March 11th, 2008, 6:00 pm

So, this might be a retarded question but the CR250 ignition (stator) I am putting on my bike has a ground wire. Is it supposed to run to the stator plate mounting bolt? Will it be ok if I do that? Just wanted to make sure since the 500 stator doesnt have one on it.

britincali · Post by **britincali** » March 11th, 2008, 7:17 pm

Thats exactly what I would do.

Caseys500 · Post by **Caseys500** » March 11th, 2008, 7:38 pm

britincali wrote:Thats exactly what I would do.

Great...thanks brit. I guess I should ask if your bike still works though!

lewisclan · Post by **lewisclan** » March 11th, 2008, 8:43 pm

Caseys500 wrote:
britincali wrote:Thats exactly what I would do.
Great...thanks brit. I guess I should ask if your bike still works though!

Good one

ou812 · Post by **ou812** » March 12th, 2008, 11:51 am

Tell us how she works when your done.

britincali · Post by **britincali** » March 12th, 2008, 11:54 am

I havent got a 250 ignition but as I said thats what I would do

My bikes run good, bits just fall off a lot

Slow old Fart · Post by **Slow old Fart** » March 12th, 2008, 1:18 pm

From what I understand a CR 125 ignition is the one you want, I believe it is much more retarded on top.

dannygraves · Post by **dannygraves** » March 12th, 2008, 1:49 pm

I'm running a 250 cdi on mine and all I can say is HOLY CRAP
I thought it would only help up top, but down low it advanced much more and retarded more up top, so the mid is about the same, down low... well you guys saw my fender after my first run with it on... and up top, I noticed a slight improvement. I thought about the 125 one, but the revs where that retards would be way out of the cr500 range anyway.

fastkart · Post by **fastkart** » March 12th, 2008, 3:21 pm

If I wanted to try the 250 ignition, I would need the entire setup correct? Not just the stator?

Slow old Fart · Post by **Slow old Fart** » March 12th, 2008, 3:33 pm

fastkart wrote:If I wanted to try the 250 ignition, I would need the entire setup correct? Not just the stator?

some years you can plug in the CDI and go from what I understand. The 125 is probably suited better for a new pipe made for top end. The Cr 500 especially the newer ones 1990 or 91 - 2001 are designed to retard upfront . the motor is really detuned.

aloha450x · Post by **aloha450x** » March 12th, 2008, 8:24 pm

who else is running thi? is this a better setup that the 500 cdi? what is involded in the swap.

ou812 · Post by **ou812** » March 12th, 2008, 10:48 pm

who else is running thi? is this a better setup that the 500 cdi? what is involded in the swap.

IMO best to not bit off more then you can chew. Get your bike finnished ride it a while, get to really know it, the last mod you want to make is ignitions off other models, you can burn holes in the piston pretty quick if you don't have a good feel for how it is reacting to a ignition mod.

Slow old Fart · Post by **Slow old Fart** » March 13th, 2008, 4:41 am

ou812 wrote:
who else is running thi? is this a better setup that the 500 cdi? what is involded in the swap.
IMO best to not bit off more then you can chew. Get your bike finnished ride it a while, get to really know it, the last mod you want to make is ignitions off other models, you can burn holes in the piston pretty quick if you don't have a good feel for how it is reacting to a ignition mod.

I burned a hole in a piston from running one size to hot on a plug and there was really no warning until it quit.

britincali · Post by **britincali** » March 13th, 2008, 8:35 am

Slow old Fart wrote:I burned a hole in a piston from running one size to hot on a plug and there was really no warning until it quit.

The plug heat range was not what burned your piston, you must have been lean also.

dannygraves · Post by **dannygraves** » March 13th, 2008, 8:37 am

I guess if you were reading the plug to see where you are at and used the wrong heat range plug, you could end up too lean... still I tune by feel, not plug..

Caseys500 · Post by **Caseys500** » March 14th, 2008, 8:01 am

ou812 wrote:
who else is running thi? is this a better setup that the 500 cdi? what is involded in the swap.
IMO best to not bit off more then you can chew. Get your bike finnished ride it a while, get to really know it, the last mod you want to make is ignitions off other models, you can burn holes in the piston pretty quick if you don't have a good feel for how it is reacting to a ignition mod.

Couldn't have said it better myself...I made sure my bike was running good before I started this swap. I got everything...the flywheel, stator and CDI. This is all from the same year range too, the 89-92 CR250.

I happened to get lucky and they are all from a 1990. The wire colors are a little different so I have been trying to make sure I get everything lined up right before I try to fire her again. I also am putting all the wiring in for it to be street legal so it may take me a while. especially since I have broken a connector or 2 that I now need to fix.

Although I like what I hear about the increased performance, I am doing this as an upgrade for the lighting capabilities. That way I didnt have to buy the stock stator, just the lighting one.

by the way...I also think that diff. ignitions affect how hot your engine runs because it makes the engine run differently ( higher revs and diff power ranges) Makes sense to me anyways

dannygraves · Post by **dannygraves** » March 14th, 2008, 9:29 am

people totally forget about timing curves, timing can be the single largest non evasive performance upgrade on a naturally aspirated motor. I am very pleased with the '88 cr250 cdi I installed. Oh, so you guys know, even though the '86 stator coild were only '86 for the 500s, they were '86-'88 for the 250 and '86-'89 for the 125.

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » March 15th, 2008, 1:14 pm

dannygraves wrote:people totally forget about timing curves, timing can be the single largest non evasive performance upgrade on a naturally aspirated motor. I am very pleased with the '88 cr250 cdi I installed. Oh, so you guys know, even though the '86 stator coild were only '86 for the 500s, they were '86-'88 for the 250 and '86-'89 for the 125.

you're using the 500 flywheel from an '86 on that ignition? anyone tried using a different flywheel?

dannygraves · Post by **dannygraves** » March 15th, 2008, 8:00 pm

Roostius_Maximus wrote:
dannygraves wrote:people totally forget about timing curves, timing can be the single largest non evasive performance upgrade on a naturally aspirated motor. I am very pleased with the '88 cr250 cdi I installed. Oh, so you guys know, even though the '86 stator coild were only '86 for the 500s, they were '86-'88 for the 250 and '86-'89 for the 125.
you're using the 500 flywheel from an '86 on that ignition? anyone tried using a different flywheel?

yup, 500 flywheel.

LOVEMYCR500 · Post by **LOVEMYCR500** » March 19th, 2008, 8:32 am

Danny, after I read this thread yesterday I went and looked to see if my Dyna 4 curve 2001 CR 250 CDI box would plug in with no other mods (I have this on my TRX 250r) and I it's a totally different plug. Now I understand how you did it using a older style 250 CDI box. Are the late 80's ignition digital? I know that is one advantage to the newer years they became digital and have hotter spark. You have to buy stator,coil,flywheel though to run the new stuff. I have curve grafts for the 2001 ignition that came with my Dyna box (can't buy these anymore) but I wonder what the curve looks like for 88?

If I could figure out how to post, I would put these up

dannygraves · Post by **dannygraves** » March 19th, 2008, 8:45 am

the '88 was still analog and basically all I had to change was to a '87+ coil and the one connector was a little different. I hear the digi ('97+) is the way to go though. you can use a higher wattage lighting coil and they had all sorts of new features with the digis to make more traction and create less wheel spin.

Caseys500 · Post by **Caseys500** » March 19th, 2008, 5:29 pm

Here is the lighting ignitions available from moose...
http://mooseracing.com/pdf/ignition.pdf

97-99 CR250 only 35W

04-08 is 75W.

I went with the 89-92 with 80W. I still need to get female bullet connectors to finish it up and try it out. I think I am gonna make sure it has spark before I put it all together to find out no worky.

Apollo · Post by **Apollo** » March 20th, 2008, 7:53 am

So basicly you can get a 2007 CR250R complete ignition system and install on a 2001 CR500R engine and it will have noticeable gains? Is it that easy? What about the stock 500 flywheel?

LOVEMYCR500 · Post by **LOVEMYCR500** » March 20th, 2008, 8:24 am

Did the 02 and newer CR 250's have the power jet carb? If so, I would not buy this ignition nor any years that had this feature. I know that 01 did not and looking at curves has a better over all curve than the years that had the powerjet carb. You take the CR 500 ignition off including the flywheel, and use the 250 stuff inculding the 250 flywheel. I don't know what the weight diff is 250 vs 500 flywheel but looking at them it's going to be pretty insignificant compared to the bottom end response you will get with the advanced timing down low. I have a feeling the curve on 90-01 CR 500's is a bit retarded at first for starting, then probably pretty flat at some point in the rpm's accross the board. The TRX 250r timing curve is at a flat 21 degrees accross the entire curve unlike the CR 250 it retards at a pretty low rpm for starting, then spikes up at a pretty high advance curve for bottom end, then starts to really retard in the upper midrange to top end for overrev. Just looking at the stator, it should just bolt right in. Use the 250 flywheel as well. I know on the TRX this alone picked up 3 HP on top, a overall broader power band and chripser throttle response. Probably have a bit easier starting as well.

Caseys500 · Post by **Caseys500** » March 20th, 2008, 9:29 am

LOVEMYCR500 wrote:Did the 02 and newer CR 250's have the power jet carb? If so, I would not buy this ignition nor any years that had this feature. I know that 01 did not and looking at curves has a better over all curve than the years that had the powerjet carb.

I thought they started using that power jet carb on the 97's or 98's

BannedCR500Riders.com

CR250 ignition for the 500 question (pic)

CR250 ignition for the 500 question (pic)